The Shearwater Tern TX is the air-integration variant of the Tern. It shares the same compact chassis (50 mm diameter, 16 mm thickness, 100 g) and the 1.3-inch 360×360 AMOLED display, but adds support for up to four wireless pressure transmitters, displaying cylinder pressure in real time on the wrist without a separate console.
Air integration makes the Tern TX operationally more valuable for divers who want consolidated wrist information: depth, no-decompression time (NDT), temperature, and cylinder pressure in a single view. The algorithm is the same ZHL-16C with gradient factors (GF), supporting air and nitrox up to 3 gas mixes. Wireless inductive charging and the 500-hour logbook are identical to the standard Tern.
The only difference between Tern and Tern TX is the transmitter radio hardware, which is factory-integrated — not an add-on. Shearwater transmitters are sold separately and are compatible with standard DIN/INT first stages. For buyers planning to use a pressure transmitter, the cost difference between the Tern and Tern TX is typically less than purchasing the transmitter hardware separately as an upgrade.
Recommended level: Intermediate and above. Ideal for divers who want everything on the wrist and already dive with their own regulator.
When to use it in Argentina
The wireless-transmitter version makes sense when diving in Argentina goes beyond simple recreational: tec dives in Mar del Plata on deeper wrecks, plans with multiple cylinders, or Beagle Channel exploration where having integrated tank pressure on the wrist avoids one extra hose in cold water.
For Las Grutas, Pirámides or any standard recreational dive the transmitter is overkill and the investment is hard to justify. Aimed at divers already using their own regulator who are moving into more demanding profiles.
Official source: Shearwater Tern TX — shearwater.com